Spark-plug.



' said plug 6 andcap 13 is disposed a. contact member conical valve seat l1 `from which extends outwardly a *ALFRED noLsTEN, or NEW YORK, N. lY.

`sr'Artnr-Prine.

Specification of Letters Patent.

Patented Oct. 29, 1907.

Application iilnd December'Z. 1904. Serial No. 235.143.

To all ywhom it vmay concern:

Be it known that l, ALrRED HoLs'rEN, a cil izen of the United StatesA` residing at the city oi' New York, borough of Brooklyn, Kings county, in the State of New York, have invented certain new and Useful Improvements in Spark-Plugs, of which the following is a iull, clear, and exact specilication.

My invention relates to improvements in means for ignit-ing the charge of explosive engines, and the same has for its object more particularly to provide a simple, reliable and eilicient spark plug which may be readily applied to the engine, and'permit of easy adjustment oi -the spark.

A further object 0i the said invention is to provide a spark plug which will not smut or corrode, be positive in its operation, and thus increase the efficiency of the' motor.

To theaccomplishment of these objects my invention consists in the novel details oi construction and in the combination, connection andarrangement of parts hereinafter more fully described, and then pointed out in the claims.

1n the accompanying drawings forming part of this specification, wherein like numerals of reference indicate like parts, Figure l isa central, longitudinalA sectional view illustrating a spark plug constructed according to and embodying my invention; Fig. 2 is a side view or' the same, and-Fig. 3 is a central, longitudinal section showing the construction of one of the contactmembers and connected parts.-

In said drawings 5 designates the apparatus as a whole comprising the plug 6 having the` nut-shaped body-portion 7, a rim or flange 8 at its' base. and a v screw-threaded projection 9 upon its under side whereby the plug may be secured into the cylinder ofv anl engine. The body-portion 7 of the plug is provided with a recess l0 having screw-threads therein, and at the center of the base of said recess 10 is arranged a bore 12. 13` denotes a capor cover for the recessed portion of said plug 6; said-cap or cover 13 having anut-shaped headllfl, a rim or iiange 'l5 atjits base, and a projecting portion' 16 at its under side provided uponv its outer surface with screw-threads adapted to engage the screw-threads upon the inner surface oi the plug 6. The inner or screw-threaded projecting portion 164 of the cap'l is provided with a recess 17, which terminates at its base in a conical valve seat 18 (corresponding with the conical valve' seat 1l in the p1 ug) from which valve seat 18 extends a bore 19 passingentir'ely through the nut-shaped head 14 ofthe capor cover 13.

20 denotes a screw arranged in the side of the body portionI oi the plug 6, and impivnging upon the threadv ed portion 16 of the cap13 whereby to secure the said pans to their adjusted positions.' Arranged within consisting oi a rod or stem 21' the ends 'of which are supported and adapted to work within the bores 12 and 19 arranged in the plug and cap respectively; said rod or stein 2l having an enlarged intermediate 60 portion 22 from the opposite ends of which extend conical valves 23, 24 which are adapted to seat upon the valve seats ,11, 18 in the recesses 10,v 17 respectively of the plug (Land cap 13, while the intermediate portion 22 fits closely into and is adapted to work 65 within the recess 17 of cap 13, and 23 denotes a longitudinal recess provided in the valve 23.A The said rod or stern 21 is made of .any suitable insulating material capable of resisting lheat, and has arranged therein a metal rod or conductor 25 having a contact 70 head 26 at its inner end,V and its outer end screwthreaded and provided with a head 27 whereby the said rod may be secured in said insulating rod or stern 21, and above said head is disposed a binding nut 28. From the inner end of the screw-threadedportion of the plug 6` vextends a contact 29 which is adapted to contact and cooperate with the head 26 dn f' l the inner end of the stem 2l.

The operation of the apparatus is as follows: As the` piston of the engine moves` outward and draws in the .w explosive charge, the stem 2l will be caused to move inward, the valve 23 to seat upon its seat 11, but beiore the same can fully seat a small quantity of air' will be drawn into and through the plug between the stem 21 and the opening 19 of the cap, andpass the 85 valve 24,`thence 'between vthe enlarged intermediate portion 22 and the socket 10, between the stem 21- and the opening 12 inthe plng 6, and after the valve 23 has seated a small quantity of air .will continue to be vdrawn -into the cylinder through the recess 23X in 90 v the valve 23, thereby serving to remove anydead gas which may accumulate or collect adjacent to the contact terminals 26, 29 at the inner end o'said plug, and. ati-the same time with thevsaid inward movement of me stem 21 the head 26 'thereof w ill'be caused to 95 `-wipe against the, contact-finger 29 and thus insure bright, clean surfaces for the spark.` With the outward movement of the stem' 21 the valver2f1 will'becaused to seat upon the'seat '18, and remain seated -during the enploding and exhausting movements of 109 -the piston, and thus lprevent the escape of the burned or exploded gases' from the cylinder'whereupon the` operation first describedwill again repeated.v

It will be observed 'that in my improved apparatus the one contact member is rigid lwhile the; other 105 carried upon a reciprocating member, the movement of which may be controlled by the adjusting means,V

arrangtd upon said apparatus wholly without the engine cylinder, and that due to themobility of ,saidl reciprocating member'the chances for soot and other 'V110' matter to settle thereon are cbviated and a positive sparking oi the plug insured whenever the circuit closing device .arranged to operaie without, the cylin- .der 'closes the electric circuit. y

Without limit-ing myself to the details o1' `,invention which may be varied within the scope oi' the patent, l'Whatl claim and desire toV s'ecure by Letters Patent 1 A spark plug comprising a socket member', a contact electrode thereon. nn insulated member arranged within said plug and adapted for reciprocation therein, oppositely closing valves arranged upon said insulated member, and a contact electrode carried by said insulated member, subst'antialiy as specified.

2. A spark plug comprising a socket member, a contact electrode thereon, n member arranged within said plug and adapted forv movement therein, opposltely-closing valves arranged upon said member, acontact electrode carried by said valved member, and means for regulating the movement of said valved member', substantially as specified.

3. .l spark plug comprising asocket member, a contact electrode' thereon. a member arranged within said plug and adapted for reciprocatlon therein, oppositely-closing valves arranged upon said member, a contact |electrode carried by 'said valved member, and means for regulating the reciprocation o! said vaived member, substantially as speeiiied.

4. A spark plug comprising a socket member, a, contact electrode thereon. a member arranged-withlnsaid plug and adapted for reclprocation therein, oppositeiy-closing valves arrangedupon said member, a `contact electrode carried by said valved member, means for regulating the reciprocation of said valved member', and means for securing said regulating' means l to its adjusted position, l substantially as specified. v f

. A spark plug comprising a socket member, a contact .electrode thereon., a ,member arranged within said spark plug and adapted to move freely therein, oppositely-closlng valves arranged upon said member, a' contact electrode carried by said member and insulated from said plug, and means for securing said valved member within said plug, substantially' as specied.

6. A spark plug comprising a socket member, a contact electrode thereon, a member arranged within said plug and adapted to move freely therein, oppositely-closlng valves i arranged upon said` member ,adapted to seat-within said electrode thereon, a cap forsaid socket member, a member arranged partly within and 'partly without said socket men'iber and cap, a contact electrode carried by saldmember,'opposltel`yoperatlng val'v'esa'rranged upon suid member, and means for 'securing said cap inposltion upon said plug, substantially as specified.

' 8. .i spark plug comprising a socketV member, a contact electrode thereon, a valve seat in said socket member, a bore yextending(therefrom. a cap for said plug having a valve seat, and a bore extending therefrom in line with the one in the socket member, an insulated stem arranged Within said bores having,oppositely.operating valves adapted to scat upon the seats aforesaid, andl a contact electrode carried by said stem, substantially as specified.

i 9.*A spark plug comprising a socket member, a contact electrode therefor, av recess in said socket member, a -cap adapted-to be fitted into said recess, a member arranged towork within said socket membeiysaid member having an enlarged portion disposed ufithln the recess of sad` plug, and prouidcd `\vi' th oppositely operating valves, and a con tactleicctrode" cari'ic'd by .said member, substantially' as specied.

season 10. spark plug comprising a socket member, a contact electrode thereon. a recess in said socket member, a cap having a recess therein adapted to be fitted into the recess of.said socket member, a member arranged partly xvithin and partly without said socket member, said member having n n enlarged portion adapted to work within the recess in said socket member and cap, oppositely operating valves arranged upon said member, and a contact electrode carried by said member adapted fdr coperation with the contact electrode iirst mentioned, substantially as specified. 11. A spark plug comprising a socket member, a contact 'electrode thereon. a recess in said socket member, a valve' seat at the base thereof, an adjustable cap having a recess therein, and a valve seat at the base thereof adapted to be fitted into the recess in'said socket member, a. reciprocating member arranged partly within and partly without said socket member and cap having an enlarged intermediate portion provided at lts ends with oppositely operating valves adapted -to seat upon the seats in said socketmember and cap, and a contact electrode carried by said reciprocating member. but insulated therefrom, adapted for cooperation with the contact electrode first mentioned, sul stantially as specified.

12. A spark plug comprising a'socket member, acontact electrode at the base thereof, a recess` in said socket member, a valve seat at the base thereof' and an `adjustable cap ndaptedgto be fitted into the recess .in said socket member, said cap having a recess therein and a'valve seat at the base thereof, means for securing said cap toits adjusted l of the socket member, and an attaching device arrangedupon the outer end of said stem, substantially' as specified.y

13. A spark plug comprising a socket member,I a'contact finger projecting from the inner end thereof, a recess in the outer end of said socket member. screw threads upon the inner surface. and a conical valve seatat the base of said recess, a bore extending from said conical valve seat to the innerend ot' said socket member, a cap having an exteriorly-throaded portion cxtendingfrom its under side adapted to engage the screw-threads upon the inner surface of the recess in the socket member, said cap having a recess therein and a conical valve seat at the base thereof, a bore extending from said conical valve seatl to the top of said cap, a screw extending throng-h the sidel of the socket memberadapted to engage the portion of the cap therein,- a stem ot insulating material arranged partly within and partly without the bores in said socket member and cap having therefor nnrenlarged intermediate portion arranged to \vork`\vithin the recess in said socket member and cap, and provided with conical valves at its opposite ends, a contact head carried upon said` reciprocating member at its inner end adapted for cooperation with the contact fingerl on the socket member, a conductor arranged within the.

Signed at the city of Xcvv York, in the county and State of New York, this twenty-eighth day of November, nineteenV hundred and iour.l

.tornanv Hons'rnN.

Witnesses C. Atois'ros Dm'rmucn, Josemi G. Qcxxx, Jr. 

